Leader-holding apparatus



Oct. 5 1926.

M. E. FERNALD LEADER HOLDI NG APPARATUS 3 Sheets-Sheet L v Filed Mrch 4, 1922 Oct. 5 1926.

M. E. FERNALD LEADER'HOLDING APPARATUS Filed March 4, 1922 3 Sheets-Sheet 2 ,Sefor im ,4% y

01.5,1926. 1,602,071 y M. E. FERNALD LEADER HOLDI NG APPARATUS File'dlMarch 4, 1922 3 mens-sheet 5 Patented Ust. 5, 1926.

UNITED STATES PATENT OFFICE.

MARK E. FERNALD, F SOUTHBORO, MASSACHUSETTS, ASSIGNOR TO C. C. BLAKE, IN- CORPORATED, OF BOSTON, IVIASSACHUSETTS, A CORPORATION OF NEV YORK;

LEADER-HOLDIN G APPARATUS.

Application filed March 4, 1922.

This invention relates to shoe making and more particularly to an apparatus for holding a leader accurately in position in a boring mill for the purpose of having drilled in it the holes by which it is to be secured to the shoe jack with which it is to be used.

In making one type of shoe on automatic machinery a jack, on which the shoe is mounted, is secured to a leader which controls the movements of the jack in automatically performing the various shoe making operations necessary to bottom the shoe. This leader is of general sole-shaped form and is provided with a guiding flange. The jack is mounted on the leader in such a position that the projections of the edge face of the insole of the shoe on the jack coincide with the inside face of the guiding flange. In order to secure the jack to the leader in the relative position described, the jack is provided with a pair of expanding bushings located a fixed distance apart but having a definite relation to a predetermined imaginary datum line on the insole, whatever its size or style may be, and the leader is provided with a pair of holes for receiving the bushings having the same relation to a like imaginary datum line on the leader.

The object of the present invention is to provide an apparatus for holding leader blanks, of all sizes and styles, in such relation to two previously set drills of a drill press that when the holes for securing the leader in place are drilled and the jack se- H cured to the leader, the inside face of the guiding flange will have the relation to the edge of the insole of the shoe which is described above.

iiccordinglyl a feature of the invention comprises a leader holder having a removable member in which are seated a pair of thimbles forming guides through which the two drills of the drill press are to operate. These thimbles are spaced apart the fixed distance which is common for the holes of all leaders. Below the thimble-carrying member is a leader supporting and centering device provided with adjustable gages by means of which a leader blank of any size or style is so positioned relative to the drill thimbles, when the latter are superimposed on the blank, as t9 receive drill holes in such a location relative to the ends of the blank Serial No. 541,246.

that, when bolted to the jack, the desired relation of the leader to the edge of the insole of the jacked shoe will be obtained.

To the accomplishment of this object, and such others as may hereinafter appear, as will readily be understood by those skilled in the art, the invention comprises the features and the combinations of parts hereinafter described and then particularly pointed out in the appended claims.

The preferred form of the invention is shown in the accompanying drawings in which Figure l is a longitudinal cross secf tional view through the leader holding apparatus; Fig. 2 is a transverse cross sectional view on the line 2 2 of Fig. l; Fig. 3 is a plan of the leader holding apparatus with the cover removed, showing a leader in place; Fig. 4 is a. plan view similar to Fig. 3 with the cover clamped in position ready for the drilling operation; Fig. 5 is a view in front elevation of the apparatus as shown in Fig. 4; Fig. 6 is a plan in full size of a leader which has been drilled; and Fig. 7 is a longitudinal rcross sectional view on line 7-7 of Fig. 6.

The purpose and use of the leader which is to be drilled with the aid of the apparatus hereinafter to be described, will first be explained, referring more particularly to Figs. 6 and 7. In one mode of manufacturing welt shoes a shoe is mounted on a jack of the saddle and spindle type, and a leader l0 is secured to the under side of the jack. This leader is provided with a guiding flange l2 and the jack is mounted on the leader so that the projections of the edge face of the insole of the shoe on the jack coincide with the inside face of the guiding flange, except at the toe of the leader where there is a slight variation to allow for the box toe. If the box toe is considered, for purposes of illustration, as a part of the insole, then the projections of the edge face of the insole coincide with the inside face of the guiding flange entirely around the leader. The leader 10 carrying the jacked shoe is inserted in an automatic machine in which the leader is actuated to transfer the point of operation of the welting or other shoe bottoming tools around the shoe.v It will thus be apparent to those skilled in the art that the inside face of the guiding flange 12 on the leader l() hears a detinite relation to the edge face or" the insole.

In assembling the leader, the lasted shoe, and the jack an imaginary datum line is selected, extending Jfrom toe to heel, -wh-ich is the same for both shoe and leader and for all sizes and styles thereof. The insole ot the shoe on the last has previously heen marked, primarily 'for another .purpose,at two points on this datum line each at an arbitrary, but the same, distance from opposite ends thereof. rEhe shoe is so located on 'the jack support thattl ese two points are `equidistant from its center. The eli-- pandingbushings, o-r otherleader clamping devices, are also equidistant tromthe center of the jack support and their centers lie in the vertical plane o't'the insole datum line. It now, the leader he clamped on the jack through 1oushing-receiving holes drilled/on its datum line equidistant 'trom'the center of the leader, the inside face ofthe leader flange `will necessarily lie vin the vertical plane ot `projections otthe edge tace ot Vthe insole, `as is desired.

It will he advantageous to describe iirst the required location, in accordance with the foregoing explanation, ol"A the `leader holes with relation to the area bounded by the leader flange; and then to descrihetheleader holder, forming the suhject m atter of the present invention, which is used 'to center all sizes and styles ot leaders inthe exact position Abeneath the drills to enable them tovreceive their holes in said required location.

'Referringlto Figt, it will Ahe assumed that parallel tangent lines @-60 and '22# are drawn at the ends oit' the inner face ot the flange '12 ot'the leader, which lines, infthe last analysis, are normal to aplane vcontaining'hoth axes ot the leader securing devices. Parallel lines aL-a and 2)-5 are draun across the 'toe and heelportions,respectively, ot the leader parallel "to the lines (le-fa and'-b at an arbitrary distance thereti-on'i. which in practice is 11/2 tor Iall -sizesand styles. The portions ot the lines o-a and ZJ-b lying between `the inside tace of the flange 12 at either side or" the leader are then hisected. ,The imaginary datum line upon which theleader holes are to he drilled passes throughthese centralpoints indicated at c and CZ. The centers ot the leader holes are equal distances from the center e ot' the liner-6L In practice the ldistance between the drills "for all leaders isli. It will'he observed that'with a small sized leader` such as is illustrated in Fig.' 6, the leader holes 14: and 16 lie outside ot' the imaginary points 0 4and d. lVith a. leader of greater length than shown on Fig. 6, the tiff-ed vdistance hetween the holes causes 'them to lie nearer to the points c and LZ, or within these points. The leader'illustrated in Figs. 3 and l in the drawings is one of the larger sizes, and in that instance, as will hereinafter he ez;- plained, `the position ot the leader holes is well within the imaginary points c and CZ.

Referring now to Figs. l to 5 the leader holder comprises a trame having a hase hlocl; 18 and a hinged cover 20. it the rear edge of the hase hlocl; rise two posts 22 which, together with two downturned lugs at the rear of the cover, lio-rm the supports tor the hinge pintle Q6 which is secure,r to the cover lov a pin 28 (Figs. l and 5). rllhe cover has the shape shown in Fig. 4 its trent edge being provided with 'two slots 3() 'for receiving the shanlzs ot clamping bolts 32 which arethreaded into posts 34; risingtrom the torward edge o-r' the hase hlocl. Extending through the cover and spaced 5% inches from center to cent-er are two thimloles 36 and 38 forming guides tor two similarly spaced drills oi a drill press. rllhe construction and mounting of 'the drill thimloles will he fully understood fr in the cross-sectional views in Fig-s. 1 and 2. In using the leader holder the traine is placed in the drill press with the axes ot its guiding thinihles in alignment with the axes oi'l the drills (not shown).

The hase hloclr lS is'provided at each end with longitudinal dove-tail ways 38 and Ll() in which are mounted slide hlocas 42 and le (Fig. The parts carried hy these two slide blocks are alike and adescription ot one will suce for hoth. A he lower vportion i6 (Fig. 2) of the slide block 42 is ot' dove-tail cross-section to tit the way 38 and supports a plate 48 which overhangs the way and hears on the surface ot the hase block 18. The plate 458 is provided `with a transverse slot 50 at. the sides et whichare seated racks 52 and 54 having lugs at their outer ends which sustain leader grippers 5G and 58 respectively. Between the racksV and meshing therewith is a pinion 6() mounted on the upper end of a vertical pin GQ re ceived in a. central bore 64 throughthe hottom of the slot 50 and extending into'the portion 46. The lowerl end ofthe pin 62 is stepped loosely in yalbearing at the bottoni l ot' the loore as fully shown on Figs. l and The pinion is thustreely rotatable hut it is continually urged to rotate in a direction to torce the leader grippers outwardly loy a torsion spring 66 secured to the block portion Llovand the under side ot the pinion. Screwed 'to the upper :tace of Vthe lplate 8 is a leader supporting plate G8 having aligned transverse slots T0 through which the leader grippers project'and the outer ends kot Awhich serve to limit the outward movement or" the grippers under the rinfluence of the spring 66.

lt is essential that the centers et the pinion 60 ineach of `the' slide block-s e2 and 44 be in the vertical plane ofthe centers ofthe -drill thimbles 36 and 38 because the centers ot these pinions correspond to the datum line points c and CZ referred to in the previous discussion. rl`he pinions are mounted on slide blocks because 'their distance apart will vary in accordance with the length of the leader to be drilled. Lines through the centers ot the grippers 56 and 58 correspond to the imaginary lines a and Z')-Z/ shown on Fig. 6. Accordingly each slide block and reterringnow to the slide block 42 is provided with a leader gage 72 which overhangs the leader supporting plate 68 at the outer end thereof and has an inner straight gaging edge 78 parallel to the center line of the leader grippers and situated 11/2 inches therefrom. Hence the gages correspond to the imaginary tangent lines a-a and 5 6 shown on Fig. 6.

Equal and opposite adjustment ot the leader supporting slide blocks is obtained through the leverage shown best in Fig. 3. An operating handle 74 is pivoted at 76 on 'the base block l0 midway between the pinions and like links T8 and 8O connect this lever to the slide blocks. The links extend from pivotal points on the longitudinal center line ot' each slide block to pivotal points on the lever equidistant from its pivotal connection to the base block. A movement of the handle 74 will actuate the slide blocks in their ways and cause the pinion centers to move in the vertical plane of the drill axes, or along a path indicated by the datum line c-(Z shown on Fig. 6.

In using the leader holder the cover 2O is thrown back, the slide blocks opened and a leader placed thereon by engaging its flange l2, at one side, with the two grippers 56 and pulling them inward in their slots 70, against the pressure of' the spring 66 until the other two grippers 58 have been drawn inward sutiiciently to bear against the tlange L at the other side ot the leader. It will be observed, see Figs. 2 and 3, that the grippers are formed with angular leader tlange engaging ends to provide a line bearing. The handle 74 is now operated to determine the distance between the gage 72 vand bring their inner edges T3 tangent to the inner tace otl the leader tlange l2 at the heel and toe ot the leader. The springs 66 permit the leader grippers to yield in or out as may be necessary during this movement ot the gages. Since the gages on one side move equally and oppositely to those on the other side the leader in its final position is centered transversely relative to the imaginary datum line hereinbetore referred to and consequently to the drill thimbles and drills which operate therethrough.

Having positioned the leader both longitudinally and transversely the cover 20 is superposed on the base block and the leader is held in position by means n? @lamps sustained by the cover. These clamps comprise pivoted levers S2, in pairs, above the toe and heel portions ot the leader and are severally pressed against the leader flange each by means ot a co-operating screw 84; (see Fig. 2)

lt will be observed that a use ot the leader holding apparatus insures that the 6% inch spaced drill holes will always have their longitudinal center line coinciding with the in'iaginary datum line CHCZ ot F 6 and will be equally spaced trom the center ot the leader. Hence all leaders will, when secured to the jack, be so positioned, both lon-- gitudin'ally and transversely, relative to the 'shoe being operated upon as to bring the outline of the inner tace otl the leader tlange vertically below the edge ot the insole of the shoe.

Those skilled in the art ot shoe making will readily perceive that the iield ot use ot the apparatus described is not limited to the singlcoperation ot drilling leaders but includes wit iin its scope the marking oit the leader by other tools than drills operating through the thimbles on the cover, and the substitution ot a shoe sole, shoe last or similar article as the piece to be positioned and marked, without inventive change in its construction or principle ot operation. ln the tollowing claims the term leader7 is used in the inclusive sense indicated by the above statement otV the scope ot the invention.

lVhile it is preferred to employ the specilic construction and arrangement ot' the parts shown and described, since this construction and arrangement is the simplest and most etlicient embodiment oit the invention which has yet been devised, it will be understood that this construction and arrangement is not essential except so tar as it. is specified in the claims, and may be varied or modiiied without departing from the broader features ot the invention.

That is claimed as new is: A

l. A leader holding apparatus comprisin@ two pairs oit leader gripping-jaws, the jaws ot each pair being movable equally and oppositely trom a Icentral po-int between them, an end gage associated with each pair ot jaws at a predetermined fixed distance trom a line drawn through said associated jaws, and means tor moving said end gages simultaneously and egually toward and trom a. central point.

2. A leader holding apparatus comprising two pairs ot leader gripping-jaws, the jaws ot' each pair being movable equally and oppositely from a central point between them, an end gage associated with each pair oi jaws at a predetermined fixed distance trom a line drawn through said Yassociated jaws, a pair ot movable blocks supporting each a pair of jaws and their associated gage7 and means 'for adjusting the distance between said blocks.

8. A leader holding apparatus Comprising heeland toe gages adjustable to receive di'jierent sized leaders between them, and means movable with each gage for holding` a leader in position between said gages.

4L. A. leader holding apparatus Comprising heel and toe to receive a leader hetWeen them, leader gripping devices assol Ciated with eaeh gage at a predetermined neoaovi fixed distance therefrom, and a separate snpport for each gage 'and its associated gripping devices.

5. A leader holding apparatus Comprising two liloels for sustaining the ends of a :'ianged leader, a gage on each loloek overlianging the leader for registering the location of the ends of the leader 'Flange on the locks, 'and means bearing on the inner snrlace of the leader flange for seating the leader in suoli registered position.

MARK E. FERNALD 

